I have an ajax request that returns a list of values like this:
"[-5, 5, 5], [-6, 15, 15], [7, 13, 12]"
I need it to be a javascript array with numbers:
[[-5, 5, 5], [-6, 15, 15], [7, 13, 12]]
I tried to replace the '[' and ']' for a '|' and then split by '|' and foreach item split by ',' and add them to an array, but this is not elegant at all.
Do you guys have any suggestions?
You can use JSON.parse() to convert that string into an array, as long as you wrap it in some brackets manually first:
var value = "[-5, 5, 5], [-6, 15, 15], [7, 13, 12]";
var json = JSON.parse("[" + value + "]");
console.log(json);
I would suggest correcting the output at the server if possible, though.
Name - probably in this case you just want to do something like create a 2D array by extracting all the contents of [ ] pairs and then exploding on commas.eval as last resort but I heard that eval is not a good choice?This solution is stupid in practice -- absolutely use JSON.parse as others have said -- but in the interest of having fun with regular expressions, here you go:
function getMatches(regexp, string) {
var match, matches = [];
while ((match = regexp.exec(string)) !== null)
matches.push(match[0]);
return matches;
}
function parseIntArrays(string) {
return getMatches(/\[[^\]]+\]/g, string)
.map(function (string) {
return getMatches(/\-?\d+/g, string)
.map(function (string) {
return parseInt(string);
});
});
}
parseIntArrays("[-5, 5, 5], [-6, 15, 15], [7, 13, 12]");
If you're generating the data, and you trust it, just use eval:
var string = "[-5, 5, 5], [-6, 15, 15], [7, 13, 12]"
var arrays = eval('[' + string + ']');
Alternatively, start returning well-formed JSON.
eval when the string is also valid JSON, please downvote me instead.In a function
var strToArr = function(string){ return JSON.parse('[' + string + ']')}
console.log(strToArr("[-5, 5, 5], [-6, 15, 15], [7, 13, 12]"));
var string = "[-5, 5, 5], [-6, 15, 15], [7, 13, 12]";
var arr = [];
var tmp = string.split('], ');
for (var i=0; i<tmp.length; i++) {
arr.push(tmp[i].replace(/\[|\]/g, '').split(', '));
}
Typing on my iPad so I apologize in advance for any typos.
